OS::Heat::Delay heat resource doesn't work

Issue

• The OS::Heat::Delay heat resource doesn't work in heat 13.0.2-0. The issue can be reproduced by the following stack template:

heat_template_version: '2018-08-31'

resources:
  delay:
    type: OS::Heat::Delay

• It just fails with error:

> o stack event list 66627608-67dd-4756-8f71-4c926b0501b9
2020-09-09 08:18:49Z [delay]: CREATE_IN_PROGRESS  Stack CREATE started
2020-09-09 08:18:49Z [delay]: CREATE_FAILED  Invalid action CREATE from actions

• heat stack-show shows a CREATE_FAILED stack_status:

(overcloud) [stack@undercloud-0-rhosp16 heat]$ heat stack-show test
WARNING (shell) "heat stack-show" is deprecated, please use "openstack stack show" instead
+-----------------------+-------------------------------------------------------------------------------------------------------------------------+
| Property              | Value                                                                                                                   |
+-----------------------+-------------------------------------------------------------------------------------------------------------------------+
| capabilities          | []                                                                                                                      |
| creation_time         | 2020-09-11T13:48:04Z                                                                                                    |
| deletion_time         | None                                                                                                                    |
| description           | No description                                                                                                          |
| disable_rollback      | True                                                                                                                    |
| id                    | 90bd5c7c-11f4-48ba-9368-771395781456                                                                                    |
| links                 | http://192.168.122.143:8004/v1/bed8859bb8114b2eba5a1de80c299709/stacks/test/90bd5c7c-11f4-48ba-9368-771395781456 (self) |
| notification_topics   | []                                                                                                                      |
| outputs               | []                                                                                                                      |
| parameters            | {                                                                                                                       |
|                       |   "OS::stack_id": "90bd5c7c-11f4-48ba-9368-771395781456",                                                               |
|                       |   "OS::project_id": "bed8859bb8114b2eba5a1de80c299709",                                                                 |
|                       |   "OS::stack_name": "test",                                                                                             |
|                       |   "index": "0",                                                                                                         |
|                       |   "ssh_key": "test",                                                                                                    |
|                       |   "image": "cirros-0.4.0-x86_64-disk.img",                                                                              |
|                       |   "network": "test",                                                                                                    |
|                       |   "flavor": "m1.micro",                                                                                                 |
|                       |   "ext_net": "ext-net",                                                                                                 |
|                       |   "network_subnet": "test-subnet",                                                                                      |
|                       |   "security_group": "default"                                                                                           |
|                       | }                                                                                                                       |
| parent                | None                                                                                                                    |
| stack_name            | test                                                                                                                    |
| stack_owner           | None                                                                                                                    |
| stack_status          | CREATE_FAILED                                                                                                           |
| stack_status_reason   | Invalid action CREATE                                                                                                   |
| stack_user_project_id | 7efa73c920fd41b0bea3dc793feebe84                                                                                        |
| tags                  | null                                                                                                                    |
| template_description  | No description                                                                                                          |
| timeout_mins          | None                                                                                                                    |
| updated_time          | None                                                                                                                    |
+-----------------------+-------------------------------------------------------------------------------------------------------------------------+

• We see the following error in /var/log/containers/heat/heat-engine.log :

2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource [req-49bbb209-bf6e-4a00-8f21-25547566ea4f - admin - default default] Unexpected exception in resource check.: AssertionError: Invalid action CREATE
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource Traceback (most recent call last):
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/check_resource.py", line 313, in check
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     adopt_stack_data)
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/check_resource.py", line 152, in _do_check_resource
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     stack, self.msg_queue)
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/check_resource.py", line 391, in check_resource_update
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     stack.time_remaining(), check_message)
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/resource.py", line 1176, in create_convergence
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     runner(timeout=timeout, progress_callback=progress_callback)
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/scheduler.py", line 163, in __call__
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     progress_callback=progress_callback):
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/scheduler.py", line 239, in as_task
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     self.start(timeout=timeout)
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/scheduler.py", line 185, in start
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     self.step()
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/scheduler.py", line 212, in step
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     poll_period = next(self._runner)
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/scheduler.py", line 356, in wrapper
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     subtask = parent.throw(*sys.exc_info())
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/resource.py", line 1250, in create
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     yield self._do_action(action, pre_func)
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/scheduler.py", line 329, in wrapper
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     step = next(subtask)
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/scheduler.py", line 320, in wrapper
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     subtask = next(parent)
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource   File "/usr/lib/python3.6/site-packages/heat/engine/resource.py", line 1026, in _do_action
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource     assert action in self.ACTIONS, 'Invalid action %s' % action
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource AssertionError: Invalid action CREATE
2020-09-11 13:48:08.611 24 ERROR heat.engine.check_resource